Improved drill



each of the lfigures.

'the drill,- and yin the de vices employed for operating 'curves forward near its upper end B, so as. to bring.

vdrill-mandrel,being reduced. in size, so as to pass through,saidfeed-mandrel, and having secured to its upper endabalance-wheel, F.'

Thehub' f 'of the' balance-wheel furnishes Aa bearing and at a right angle with the line ofthe arm O.

naar' @saca @anni @illite- HAMILTON BATES AND DANIEL L. BATES, OF DAYTON, OHIO.

Laim Patent No. '92,419, dated .my 13, 1869. i

IMPROVED DRILL.

- The Schedule referred to in these Letters Patent and making par?. ol' the same To all whom 'it may concern:

mandrels, on the line x' a'fof g'. 1.

Letters ofv likename and kind refer tolike parts in The nature of our invention consists in the general construction and` arrangement `of the various parts of the feedaut'omatically, asis hereinafterfully setv forth. In the annexed'.drawing-l .A-.zlrepresentsth'e verticalportion of the frame, -which said end in a horizontal position, or atp-a right angle to said frame. L

Extending outwardfroml the frame, near its lower end, at a right angle with its face, is an arm, C, the outer en d of whichis Yin line withthe end B, and, in connection therewith, furnishes-a bearing-'for the drill andfeed-mandrels D-jandv E, the feedfmaiidrel being hollow, and' provided withl a f male-screw thread upon it-ssi'irface,v corresponding with a female-screw thread within the opening of the end B, the upper part ofthe foi- ,the'upper' end of the feed-mandrel, and a collar, G, securcd'upon ,the'drill-mandrel by a set-screw, g,fur nshes a' bearing for its lower end, so that while either of said mandrels-may revolve independent of the other, their relative position longitudinally is always maintained.

Extending upward and outward from -the outer end of the arm O, is an additional arm, H, which furnishes a bearing for a shaft, I, said bearing being horizontal Attached t0 the inner end of the shaft I, is a bevelgear, K, the teetli of which mesh wit-l1 those of a nevel-pinion, L, through which the drill-mandrel passes. Y

The bevel pinion is provided with a hub, which extends through the bearing in the arm G, and has upon its inside'a key or feather, corresponding with' a slot, d,' extending lengthwise upon the drill-mandrel, by means of which a rotary motion, given to said pinion, is communicated to said inandrel, which at the same time is allowed to pass freely through said pinion in a vertical direction.

A crank, M, secured to the outer end of the shaft I, furnishes a means for imparting motion, through said shaft-gear and pinion, to the drill-mandrel.

Secured to the lower end of the'feed-niandrel is a wheel, N, by means-of which a` rotary motion can be given'tovsaidmandrel bythe hand, and the drill-man d rel raised or lowered, as may be desired.

f A's, however, it often proves inconvenient to ope'rate the drill and feed, and at the same time attend to the work, the following-described means are employed to secure an automatic downward feed:

Attached to the upper side of the' wheel N is a ring, A O, having upon its upper face a seriesof angular teeth..

A lever, P, pivoted at its centre to a lug, p, secured -to the frame, is provided at its 'upper end with a pa'wl,`

1t, the rear end of which is'pivoted to said'lei-'eu'while its iont end rests upon and engages with the teeth oftheringO. v. l

`vllielower end of the lever extends forward beside j the rear face of the bevel-gear K, so4 as to engage'with Aa scmici-rcular projection or cam, 7c, upon said face,l'so that at each revolution 4of said gear, the lower end of said lever shall be pressed backward, and, bymea-ns of the pawl, rotate the ring O and feed-mandrel. v

Thisv device possesses many advantages `over any" in use-intended for a likepurpose, amongwhich are;- First, strength and durability. The franie and arms being cast in one piece, there is nopo'ssibili'ty that any of the working-parts should get out of line, or1inV any manner become deranged, and bythe length of the bearings'in said frame, and the proportion of the several parts of the device, great durability is secured.

Second,theautoinatic feededevices aresiiuple, du-

rablc, and perform their oice in the most perfect manner, rendering the drill far more easy to operate than would be lpossible without them. v

Having thus fully set forth the nat-ure and merits of our invention, j

lVha-t we claim as new, ,and desire to secure by LettershPatent, is y The improved automatic feed-devices, consisting of the. ring O, lever P, pawl R, and projection or cani k, upon thebe'v'el-gear K, all constructed and arranged to operate' substantially as and for .the purpose shown.

Also, the within-described improved drill-press, consisting ofthe frame A,B, O, and H, .mandrels D and' E, balance-wheel F, hand-wheel N, shaft I, gear and pinion K andL, and crank M,fiu combination with the automatic vfeed-devices hereinbefore described,.sub stantially as and for the purpose specified.

In testimony that we claim the foregoing, we have hereunto set our hands, this 7th day of J une, 1865). HAMILTON BATES.

DANIEL L. BATES.

Witnessesz l JOHN F. HELLEE, Tnos. D. MITCHELL. 

